~anthropic/claude-sonnet-latest → B (6:4)

Both are refactors, but B fixes a real design flaw (identity rewriting scattered/duplicated across reducer and events, ambiguous @ sigil handling, agent required even for human-only ingests) with a clean split into identity.rs/canonical_path.rs, consistent wire-form contracts, and updated tests/integration scripts proving the new behavior end-to-end. A introduces a plausible composable url_rules engine but is mostly a large mechanical find-replace of test fixtures from bare hostnames to https:// URLs, with the actual new engine/registry code being sizable but less proven by broad test coverage across the whole system (CLI, api, html, bb integration tests) as B demonstrates.